Upload files with model data in MVC

Upload multiple files with model data in MVC is really very easy, when I started to test by uploading some files, I though it would be more complicated but it is really not. In my previous post ASP.Net MVC file upload, I promised to post soon about how to upload multiple files. When I was writing I thought why cannot add model data as well at the time of uploading the files.

We will create a simple expense detail page with multiple files, I created a very simple just two value property, expense description and amount, which will be stored into database and as many files as we want supporting to this expense.

alt text

So let's start by creating first our model

public class ExpenseModel
    [Required(ErrorMessage = "{0} is required")]
    [Display(Name = "Expense Description")]
    public string Description { get; set; }

    [Required(ErrorMessage = "{0} is required")]
    [Display(Name = "Amount")]
    public string Amount { get; set; }

We have not defined any property in our model to upload the file or list of files, we will discuss it why, once we will see our controller.

And here is the view HTML using Razor engine

@model MvcUploadMultipleFiles.Models.ExpenseModel

    ViewBag.Title = "Expense With Documents";
    Layout = "~/Views/Shared/_Layout.cshtml";

<h2>Expense With Documents</h2>

@using (Html.BeginForm("Cars", "Expense", FormMethod.Post, 
          new { enctype = "multipart/form-data" }))

    @Html.LabelFor(m => m.Description)
    <div>@Html.TextBoxFor(m => m.Description)</div>

    @Html.LabelFor(m => m.Amount)
    <div>@Html.TextBoxFor(m => m.Amount)</div>
    <input type="file" name="FileUpload1"  />
    <input type="file" name="FileUpload2"  />
    <input type="file" name="FileUpload3"  />
    <input type="file" name="FileUpload4"  />
    <input type="file" name="FileUpload5"  />

    <input type="submit" value="Upload" class="btn" />

    <div class="err">

Finally without any further description here is our CarsController, which is the simplest one, see

public ActionResult Expense()
    return View();

public ActionResult Expense(ExpenseModel model)
    /* Code to save save model data into database. */ 

     foreach (string upload in Request.Files)
         if (Request.Files[upload].ContentLength == 0) continue;
         string pathToSave = Server.MapPath ("~/Documents/");
         string filename = Path.GetFileName(Request.Files[upload].FileName);
         Request.Files[upload].SaveAs(Path.Combine(pathToSave, filename));
      return View();

In our post action we are not getting any file or list of files as a parameter. Yes, we don't need that, we can get a collection of files by using Request.Files as I am looping it and try to check the length of posted file if length is zero, try to check next control.

In this article I added 5 input type="file", but we can add a button to add controls dynamically by using JavaScript. In this way we can give facility to add as much control as user wants. So we can give option to add or remove control.

For a better approach see the linkTo upload image with client side validation and image type all is set in model itself

Ali Adravi Having 13+ years of experience in Microsoft Technologies (C#, ASP.Net, MVC and SQL Server). Worked with Metaoption LLC, for more than 9 years and still with the same company. Always ready to learn new technologies and tricks.
  • mvc
  • file-upload
By Ali Adravi On 04 Jun, 13  Viewed: 25,605

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